We are trying to use multiple solver session to solve a large scale problem. We have taken the case of flow shop problem given in AIMMS. 

We are trying to change the “Number of parallel workers = 2/3/4”, but after solving it is resetting this value to 1 after solve and the solution time is also not improving. 

We have used the following for delegate to server

if not ProjectDeveloperMode then
    if pro::DelegateToServer(timeout : 108000000,completionCallback:'pro::session::loadResultsCallBack', waitforcompletion:1) then
        return;
    endif;
endif;

Kindly help and let us know how to use multiple solver session for a large scale optimization problem. 

Thanks.